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SAE-AISI 4161 Steel vs. ASTM A285 Carbon Steel

Both SAE-AISI 4161 steel and ASTM A285 carbon steel are iron alloys.

For each property being compared, the top bar is SAE-AISI 4161 steel and the bottom bar is ASTM A285 carbon steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200
110 to 130
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 20
30 to 34
Fatigue Strength, MPa 290
150 to 180
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 420
250 to 290
Tensile Strength: Ultimate (UTS), MPa 680
380 to 450
Tensile Strength: Yield (Proof), MPa 410
190 to 230

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 420
400
Melting Completion (Liquidus), °C 1460
1470
Melting Onset (Solidus), °C 1410
1420 to 1430
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 43
53
Thermal Expansion, µm/m-K 12
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
7.0
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
8.0

Otherwise Unclassified Properties

Base Metal Price, % relative 2.5
1.8
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 1.5
1.4
Embodied Energy, MJ/kg 20
18
Embodied Water, L/kg 50
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
110
Resilience: Unit (Modulus of Resilience), kJ/m3 460
94 to 150
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 24
13 to 16
Strength to Weight: Bending, points 22
15 to 17
Thermal Diffusivity, mm2/s 12
14
Thermal Shock Resistance, points 22
12 to 14